Screw-threading machine.



T. Z. CARPENTER.

SCREW THREADING MACHINE.

APPLICATION mm) AUG.28, I912.

1,143,942. Patented June 22, 1915.

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T. Z. CARPENTER.

SCREW THREADING MACHINE.

APPLICATION'FILED Aus.2B, I912.

1,143,942. Patented June 22, 1915.

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THE NORRIS PETERS C0 FHOTO-LITHO., WASHINGTON, D. C

T. Z. CARPENTER.

SCREW THREADING MACHINE.

APPLICATION FILED AUG.2B. 1912. 1,143,942. Patented June 22, 1915.

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T. Z. CARPENTER.

SCREW THREADING MACHINE.

APPLICATION FILED AUG.28, I912.

1,143,942. Patented June 22, 1915.

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THE NORRIS PETERS 60., F'HOTO-LITHQ. WASHINGTON. L)v c STATES PATENTFFTfiE.

'ir-EUNAUSKI z. CARPENTER, 0F PROVIDENCE, RHODE ISLAND, AssIGNoR 'roFEDERAL SCREW CORPORATION, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OFRHODE Patented June 22, 1915.

Serial No. 717,522.

ISLAND.

SGREW-THREADING MACHINE.

1,143,942. Specification of Letters Patent.

Application filed August 28, 1912.

To all whom it may concern:

Be it known that I, TEUNAUSKI Z. CAR- PEN'IER, citizen of the UnitedStates, and resident of Providence, in the county of Providence andState of Rhode Island, have invented certain new and useful Improvementsin Screw -Threading Machines, of which the following is a specification.

This invention relates to improvements in screw threading machines, andhas for its object to provide such a machine with mechanism having atransferring member for receiving the blank from a suitable feed anddepositing its head between the jaws of a rotatable chuck, to thenoperate a pointing device to reduce or point the end of the screw blank,to next position a back rest to support the blank while the thread isbeing formed thereon by a suitable cutter and to provide a grippingmember for engaging and binding the finished screw to the back rest andto cause the back rest to move longitudinally to remove the screw fromthe jaws and finally to withdraw the gripper to deposit the finishedscrew.

The invention consists essentially of the gripper member carried by theback rest which is adapted to engage and bind the finished screw to therest and also the mechanism for moving the back rest, its gripper andthe screw carried thereby longitudinally to subsequently release thescrew to be deposited. By this construction the rest performs a doublefunction, first it supports the blank while being cut, and second, itserves to assist in removing the finished screw. By this movement itwill be seen that the back rest is carried completely out of the way topermit the quick action of the mechanism to deposit a fresh blank intothe jaws to be out, without waste of time.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be fully described andparticularly pointed out in the appended claims.

Of the accompanying drawings, Figure 1 is a side elevation showing thegeneral arrangement of mechanism for operating a screw cutting machine.Fig. 2- is an en- .larged plan view of a portion of the operatingmechanism. Fig. 3 is a sectional elevation on line 33 of Fig. 2 lookingin the direction of the arrow. Fig. 4:- is a detail illustrating the cammechanism for imparting a longitudinal motion to the back rest. Fig. 5is a detail of the cam for operating the pointer mechanism. Fig. 6- is adetail of the cam for Operating the screw gripping finger showing aportion of the back rest in section. Fig. 7- is a detail of the camwhich operates the mechanism for carrying the screw from its supplyfountain to the point where it is engaged by the transferrcr fingers.Fig. 8 is a detail side elevation of the cam for operating the transferrer fingers. Fig. 9 is an edge view of the cam shown in Fig. 8.

Referring to the drawings, 10 shows a general frame construction inwhich the operating mechanism is mounted, the upper portion of which isshown as supporting a hopper 11 of any suitable construction and isillustrated as being partly broken away. From this hopper the screwblanks are fed by suitable means down the channel 12 of the fountain 13and are deposited into the carrier 14, see Fig. 3, which carrier isreciprocated by the cam 15 mounted on shaft 31, see also Fig. 7, throughthe finger l6, arm 17 and connection 18 to move the blanks one at a timefrom the fountain out to the position 19 as illustrated in Fig. 3 whereeach blank is engaged by the transferrer fingers 20, which is actuatedby the cam 21, see also Fig. 8, mounted on shaft 31, pin 22, finger 23and arm 24, to first raise the blank out of engagement with the carrierby the rise 25 of the cam 21, then dropped to the position 26, see Fig.3, into alinement with the central opening between the jaws 27 of thechuck 28, see Fig. 1, and when moved to this position the cut away sideface of the cam 29, as best illustrated in Fig. 9, is presented andpermits the fingers 23 and arm 24 under pressure of the spring 30, tomove longitudinally a distance suiiicient to pass the head of the blankbetween said chuck jaws 27 Fig. 3 after which the continued rotation ofthe cam 21 again raises the transferrer fingers to repeat the operationjust described.

The next operation after depositing the blank into the jaws is that thecam 32 on its shaft, see Fig. 1, is rotated through the gears 32 and byoscillating the lever 33 permits the jaws of the chuck 28 under actionof the spring 3% to close upon the head of the screw blank to rotate thesame. The next action of the machine is to advance ing the finishedscrew to said rest, and means for moving said rest to remove said screwfrom said chuck.

3. In a screw threading machine, means for receiving and rotating theblank, means for cutting threads on the blank, a rest for supporting theblank while being cut, and means including said rest for removing thescrews from the chuck when finished.

4. In a screw threading-machine, a rotatable chuck, means for depositingscrew blanks into the jaws of said chuck, a cutter for threading theblank, a back rest, means for moving said rest to support the blankwhile being cut, means for removing the cutter after having cut theblank, means for binding the finished screw to the rest, means forcausing said chuck to release the screw, means for moving the rest andscrew from said jaws, and means for subsequently removing said bindingmeans to release and deposit the screw.

5. In a screw threading machine, a rotatable chuck, means for depositingscrew blanks into the aws of said chuck, a cutter for threading theblank, a back rest, means for moving said rest to support the blankwhile being cut, means for removing the cutter after having cut theblank, a finger carried by said chuck, means for moving said fingers toengage and bind the finished screw to the rest, means for moving therest and screw thus held from said jaws, and means for subsequentlywithdrawing said finger to release and deposit the screw.

6. In a screw threading machine, a rotatable chuck, means for depositingscrew blanks into the jaws of said chuck, a cutter for threading theblank, a back rest, means for removing said rest from the Work while itis being pointed, means for moving said rest to support the blank whilebeing threaded, means for removing the cutter after having threaded theblank, a finger carried by said chuck, a rotatable member for movingsaid finger to engage and bind the finished screw to the rest, means formoving the rest and screw thus held from said aws, and means forsubsequently withdrawing said finger to release and deposit the screw.

7. In a screw threading machine, a rotatable chuck, means for depositingscrew blanks into the jaws of said chuck, a cutter tor threading theblank, a back rest, means for removing said rest from the work while itis being pointed, means for moving said rest to support the blank whilebeing threaded, means for removing the cutter after having threaded theblank, a finger carried by said chuck, a rotatable member for movingsaid finger to engage and bind the finished screw to the rest, a cam formoving the rest and screw thus held longitudinally from said jaws, andmeans whereby said finger is arranged to disengage said fingers andpermit it to release and deposit the screw.

8. In a screw threading machine, a rotatable chuck, means for depositingscrew blanks into the jaws of said chuck, a cutter for threading theblank, a back rest, means for moving said rest to support the blankwhile being threaded, means for removing the cutter after havingthreaded the blank, and a spring controlled finger normally withdrawncarried by said rest, a rotatable member arranged to raise said fingerto engage and bind the finished screw to the rest, means for removingthe rest and screw thus held longitudinally from its aws, and meanswhereby such movement causes said finger to be released by its cam toreturn to normal and release the screw.

9. In a screw threading machine, a rotatable chuck, means for depositingscrew blanks into the jaws of said chuck, a cutter for threading theblanks, a back rest, a cam for moving said back rest longitudinally anda second cam for moving said rest forward to engage and support thescrew while being cut, means for withdrawing the cutter after threadingthe blank, a gripper carried by said rest, means for moving said gripperto engage and bind the finished screw to the rest, means for moving saidrest with its screw from engagement with said second cam to movebackward, and means for removing the gripper to release the screw.

10. In a screw threading machine, a rotatable chuck, means fordepositing screw blanks into the jaws of said chuck, a cutter forthreading the blanks, a back rest, means for removing said rest from thework while it is being pointed, a cam for moving said back restlongitudinally and a second cam for moving said rest forward to engageand support the screw while being threaded, means for withdrawing thecutter after threading the blank, a gripper carried by said rest, arotatable member for moving said gripper to engage and bind the finishedscrew to the rest, a cam for moving said rest longitudinally out ofengagement with said second cam, means for moving said rest backward outof line with said blank pointer, and means for causing said gripperactuating mechanism to release the screw.

In testimony whereof I afIiX my signature in presence of two witnesses.

TEUNAUSKI Z. CARPENTER.

Witnesses:

S. T. TINsLnY, WILLIAM P. DODGE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

